:root {
  --bg-gradient: linear-gradient(135deg, #004c6d 0%, #00a8cc 50%, #7ebb41 100%);
  --text-dark: #003740;
  
  --font-aero: "Segoe UI", "Trebuchet MS", Arial, sans-serif;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-dark);
  font-family: var(--font-aero);
  min-height: 100vh;
}

.aero-container {
  max-width: 1050px;
  margin: 0 auto;
  padding: 60px 20px;
}

.aero-header {
  text-align: center;
  margin-bottom: 50px;
  color: #fff;
  text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.nav-back {
  display: inline-block;
  color: #fff;
  text-decoration: none;
  font-weight: bold;
  border: 1px solid rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(5px);
  padding: 6px 16px;
  border-radius: 20px;
  box-shadow: inset 0 5px 5px rgba(255, 255, 255, 0.3);
  margin-bottom: 20px;
}

.nav-back:hover {
  background: rgba(255, 255, 255, 0.3);
}

.aero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  margin: 0;
}

.aero-subtitle {
  font-size: 1.15rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 10px auto 0 auto;
}

.aero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 30px;
}

.aero-card {
  background: rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 24px;
  padding: 35px;
  box-shadow: 
    inset 0 15px 15px rgba(255, 255, 255, 0.5), 
    0 15px 30px rgba(0, 55, 64, 0.15);
  transition: transform 0.3s;
}

.aero-card:hover {
  transform: translateY(-4px);
}

.aero-card h2 {
  font-size: 1.45rem;
  color: #005c6d;
  margin-top: 0;
}

.aero-card p {
  font-size: 0.95rem;
  line-height: 1.5;
}

.glassy-pill {
  display: inline-block;
  background: rgba(255, 255, 255, 0.6);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: bold;
  border: 1px solid rgba(255,255,255,0.8);
  box-shadow: inset 0 5px 5px rgba(255,255,255,0.4);
  margin-right: 8px;
  margin-top: 5px;
}

/* Classic Web 2.0 split glossy button */
.glossy-btn {
  width: 100%;
  border: 1px solid #3c5e1c;
  border-radius: 20px;
  color: #fff;
  font-family: inherit;
  font-weight: bold;
  font-size: 1rem;
  padding: 12px;
  cursor: pointer;
  background: linear-gradient(180deg, 
    #9ad453 0%, 
    #7ebb41 50%, 
    #669d2c 50%, 
    #7bb63d 100%
  );
  box-shadow: 
    0 4px 10px rgba(0,0,0,0.15), 
    inset 0 1px 0 rgba(255,255,255,0.5);
  text-shadow: 0 -1px 1px rgba(0,0,0,0.3);
  transition: transform 0.1s;
}

.glossy-btn:hover {
  background: linear-gradient(180deg, 
    #a6e05f 0%, 
    #8bc94b 50%, 
    #72ad33 50%, 
    #8ac549 100%
  );
}

.glossy-btn:active {
  transform: scale(0.98);
}

/* Bubble popping box */
.bubble-container {
  height: 160px;
  background: rgba(0, 0, 0, 0.08);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 16px;
  margin: 20px 0;
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 5px 10px rgba(0,0,0,0.1);
}

/* Skeuomorphic Glass Spheres */
.aero-sphere {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  position: absolute;
  bottom: -40px;
  cursor: pointer;
  background: radial-gradient(circle at 30% 30%, 
    rgba(255, 255, 255, 0.7) 0%, 
    rgba(0, 168, 204, 0.4) 60%, 
    rgba(0, 92, 109, 0.8) 100%
  );
  box-shadow: 
    inset -3px -3px 6px rgba(0, 0, 0, 0.25),
    0 5px 10px rgba(0, 55, 64, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.4);
  transition: transform 0.1s ease-out, opacity 0.1s;
}

.aero-sphere::after {
  content: "";
  position: absolute;
  top: 5px;
  left: 8px;
  width: 10px;
  height: 6px;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 50%;
  transform: rotate(-15deg);
}

/* Lists */
.aero-list {
  list-style: none;
  padding-left: 0;
}

.aero-list li {
  margin-bottom: 12px;
  position: relative;
  padding-left: 25px;
}

.aero-list li::before {
  content: "💧";
  position: absolute;
  left: 0;
  top: 1px;
}